Here's some info: http://www.ask.com/bar?q=Can+I+Substitute+Baking+Soda+for+Baking+Powder&page=1&qsrc=6&zoom=What+%3CKW%3ECan+I+Substitute%3C%2FKW%3E+in+Place+of+%3CKW%3EBaking+Powder%3C%2FKW%3E%7CWhat+%3CKW%3ECan%3C%2FKW%3E+Be+Used+instead+of+%3CKW%3EBaking+Powder%3C%2FKW%3E%7C%3CKW%3ESubstitute%3C%2FKW%3E+for+Cream+of+Tartar&ab=2&u=http%3A%2F%2Fchemistry.about.com%2Fb%2F2006%2F11%2F19%2Fbaking-powder-baking-soda.htm
And I think the cookies will taste salty.
I agree on the salty.
Could you frost them with a peanut butter frosting? The extra salt may work in that, as peanut butter usually wants a little extra salt, anyway.
For the future, you can just leave the leavening out altogether. Melissa taught me that, and you can't tell there isn't anything missing.
Quote by @%username% on %date%
%body%